To make buying/selling this item easier and to use less space in your bank.

Notes:

If you try alch the set it says: "It's not a good idea
to do that to an item set!". To get the cannon parts inside, right click the G.E Clerk and press Sets, then right click and press Exchange to get your parts.

You cannot set up the set in the Slayer Tower, you'll get a message saying: "Dark forces are preventing the dwarven construction from working."

You cannot set up in Kuradal's Dungeon. You will get a message saying: "It's too damp down here to set your cannon up!"